90 citations · 430 across the 21 of their papers we have counts for
21 papers
Microscopic polarization and magnetization fields in extended systems
Perry T. Mahon, Rodrigo A. Muniz, J. E. Sipe
We introduce microscopic polarization and magnetization fields at each site of an extended system, as well as free charge and current density fields associated with charge movement…
Quantum Interference Control of Localized Carrier Distributions in the Brillouin Zone
Perry T. Mahon, Rodrigo A. Muniz, J. E. Sipe
Using transition-metal dichalcogenides as an example, we show that the quantum interference arising in two- and three-photon absorption processes can lead to controllable, highly l…
Quantum Interference Control of Photocurrents in Semiconductors by Nonlinear Optical Absorption Processes
Kai Wang, Rodrigo A. Muniz, J. E. Sipe +1
We report experiments demonstrating Quantum Interference Control (QuIC) based on two nonlinear optical absorption processes in semiconductors. We use two optical beams of frequenci…
Quantum Interference Control of Carriers and Currents in Zincblende Semiconductors based on Nonlinear Absorption Processes
Rodrigo A. Muniz, Cuauhtémoc Salazar, Kai Wang +2
Quantum interference between optical absorption processes can excite carriers with a polarized distribution in the Brillouin zone depending on properties of the incident optical fi…
Jerk current: A novel bulk photovoltaic effect
Benjamin M. Fregoso, Rodrigo A. Muniz, J. E. Sipe
We investigate a physical divergence of the third order polarization susceptibility representing a photoinduced current in biased crystalline insulators. This current grows quadrat…
The optical properties of dibenzoterrylene
Z. S. Sadeq, Rodrigo A. Muniz, J. E. Sipe
Dibenzoterrylene (DBT) has garnered interest as a potential single photon source (SPS). To have a better grasp of any possible limitations of using DBT for this application, a bett…
The role of impurities on the optical properties of rectangular graphene flakes
Z. S. Sadeq, Rodrigo A. Muniz, J. E. Sipe
We study rectangular graphene flakes using mean field states as the basis for a configuration interaction calculation, which allows us to analyze the low lying electronic excited s…
A Green function method to study thin diffraction gratings
Daniel A. Travo, Rodrigo A. Muniz, Marco Liscidini +1
The anomalous features in diffraction patterns first observed by Wood over a century ago have been the subject of many investigations, both experimental and theoretical. The sharp,…
An effective model for the electronic and optical properties of stanene
Cuauhtémoc Salazar, Rodrigo A. Muniz, J. E. Sipe
The existence of several 2D materials with heavy atoms in their composition has been recently demonstrated. The electronic and optical properties of these materials can be accurate…
Strong and Anisotropic Third Harmonic Generation in Monolayer and Multilayer ReS
Qiannan Cui, Rodrigo A. Muniz, J. E. Sipe +1
We report observation of strong and anisotropic third harmonic generation (THG) in monolayer and multilayer ReS. The third-order nonlinear optical susceptibility of monolayer R…
Photocurrents in Bi2Se3: bulk versus surface, and injection versus shift currents
Derek A. Bas, Rodrigo A. Muniz, Sercan Babakiray +3
Optical injection and detection of charge currents can complement conventional transport and photoemission measurements without the necessity of invasive contact that may disturb t…
All-optical injection of charge, spin and valley currents in monolayer transition metal dichalcogenides
Rodrigo A. Muniz, J. E. Sipe
Monolayer transition metal dichalcogenides have recently become a playground for spin- and valleytronics research. Their low energy spectrum can be described by Dirac cones on the…
Coherent control of optical injection of spin and currents in topological insulators
Rodrigo A. Muniz, J. E. Sipe
Topological insulators have surface states with a remarkable helical spin structure, with promising prospects for applications in spintronics. Strategies for generating spin polari…
Low-energy theory of a two-dimensional itinerant chiral magnet
Armin Rahmani, Rodrigo A. Muniz, Ivar Martin
Effective actions, such as nonlinear sigma models, are important tools in studying low-energy fluctuations of magnetically ordered states. Here we derive an effective action for th…
Generalized spin-wave theory: application to the bilinear-biquadratic model
Rodrigo A. Muniz, Yasuyuki Kato, Cristian D. Batista
We present a generalized spin-wave theory (GSWT) for treating spin Hamiltonians of arbitrary spin . The generalization consists of an extension of the traditional spin-wave theo…
Anyons in integer quantum Hall magnets
Armin Rahmani, Rodrigo A. Muniz, Ivar Martin
Strongly correlated fractional quantum Hall liquids support fractional excitations, which can be understood in terms of adiabatic flux insertion arguments. A second route to fracti…
Fractionalization in spontaneous integer quantum Hall systems
Rodrigo A. Muniz, Armin Rahmani, Ivar Martin
It is widely believed that integer quantum Hall systems do not have fractional excitations. Here we show the converse to be true for a class of systems where integer quantum Hall e…
Visualization of nano-plasmons in graphene
Hari Dahal, Rodrigo A. Muniz, Stephan Haas +2
We study localized plasmons at the nanoscale (nano-plasmons) in graphene. The collective excitations of induced charge density modulations in graphene are drastically changed in th…
A non-linear transport method for detecting superconducting stripes
Rodrigo A. Muniz, Ivar Martin
We theoretically study the effect of stripe-like superconducting inclusions on the non-linear resistivity in single crystals. Even when the stripe orientation varies throughout the…
Impurity assisted nanoscale localization of plasmonic excitations in graphene
Rodrigo A. Muniz, Hari P. Dahal, A. V. Balatsky +1
The plasmon modes of pristine and impurity doped graphene are calculated, using a real-space theory which determines the non-local dielectric response within the random phase appro…
Plasmonic Excitations in Tight-Binding Nanostructures
Rodrigo A. Muniz, Stephan Haas, A. F. J. Levi +1
We explore the collective electromagnetic response in atomic clusters of various sizes and geometries. Our aim is to understand, and hence to control, their dielectric response, ba…